If you have any problems with these libraries, you can install them manually by compiling the source code. Just follow the instructions at the [Red Hat/CentOS section of the Nokogiri tutorials](http://nokogiri.org/tutorials/installing_nokogiri.html#red_hat__centos) .

-Also, SQLite3 and its development files for the `sqlite3` gem — in Ubuntu you're done with just

+Also, SQLite3 and its development files for the `sqlite3-ruby` gem — in Ubuntu you're done with just